Size:Twin/Twin X-Large Ã¯Â¾Â |Ã¯Â¾Â Color:Blue Add a bright and modern collection to your space with the Intelligent Design Clara duvet cover set. Made from polyester microfiber, the bright aqua color and geometric design bring your space to life. One matching sham features two of the top of bed designs to bring the aqua color all the way up the bed. Two decorative pillows feature hexagons to complete this geometric look. A duvet cover is a protective cover for your comforter, most likely for your down comforter. Sometimes it’s referred to as a comforter cover. Duvet covers are not filled. It has an opening where you can insert your comforter. Filler not included.